Thursday, October 7, 2010

Writing and Naming Ionic and Covalent Compounds - Isabelle Cheng

Isabelle Cheng
October 7, 2010
Block 1-2 Chemistry 11
Ms.Chen
Writing and Naming Ionic and Covalent Compounds 
IONIC COMPOUNDS:
composed of two or more particles (ions) --> oppositely changed
held together by electrostatic forces
electrons are transferred from a metal to a non-metal
Ex. Li+1     O-2
= Li2O
Ex. Ti has 4+ or 3+
Titanium (IV) fluoride ---> TiFl4
Ex. Complex Ions: a group of atoms that behave as one atom.
Na2SO4 ---> Sodium Sulphate
Na3PO4 ---> Sodium Phosphate





COVALENT COMPOUNDS:
share electrons
non-metal with non-metal
- use GREEK prefixes to indicate the number of atoms
*Diatomic molecules: H2,O2,F2,Br2,N2,Cl2,I2
MEMORIZE:
mono - 1
di - 2
tri - 3
tetra - 4 
penta- 5
hexa - 6
hepta - 7
octa - 8
nona - 9
deca - 10
Ex.
a) CO2 - Carbon dioxide
b) N2O4 - Dinitrogen Tetraoxide


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